329 

 6. Heteromyia TRiviALis Loew 



Ceratopogon Irivialis Loew, Berl. Ent. Zeitschr., 1861, p. 309, sp. 4. 

 Palpomyia. Irivialis (Loew) Malloch, Bull. 111. State Lab. Nat. Hist., Vol. 10, 

 p. 217. 



Female. — Black, shining. Scape of antennae, fore femora, bases 

 of mid and hind femora, apices of fore tibise, and bases of all the tarsi 

 vellow. Wings slightly grayish, veins brown, the thick veins very 

 distinct. Halteres black. 



Eyes distinctly separated ; antennae about one anfl a half times as 

 long as head and thorax together. Disc of mesonotum without dis- 

 tinct hairs. Fore femora distinctly thicker than mid pair but not thicker 

 than hind pair, the thorns (3-4) confined to apical half; claws of 

 fore and mid tarsi simple, equal, rather small, those of hind tarsi dis- 

 tinctlv longer but of similar structure. Third vein extending to four 

 fifths of the wing-length, slightly thickened; first, to one third the 

 length of third, its last section equal to penultimate section of third; 

 media forking distinctly before cross vein, the base of posterior branch 

 obsolete, cubitus forking distinctly before cross vein. 



Length, 2-2.5 ^'^^'^'^■ 



Localities: Muncie, 111., May 24, 1914; and Monticello, 111., June 

 21, 19 14. Swept from vegetation along the banks of streams by C. A. 

 Hart and the writer. 



Originally described from the District of Columbia, and subse- 

 quently recorded by Smith from New Jersey. 



I have decided that this species belongs more properly to Hetero- 

 myia than to Palpomyia because of the thickening of the fore femora 

 and the absence of spines from the other pairs. I had not seen the 

 species when I wTOte mv recent revision of the genus Palpomyia. 



7. Heteromyl\ opacithorax, n. sp. 



Female. — Differs from hirta and flaripes in being much more, 

 robust, in having the thorax subopaque, the surface with slight pruines- 

 cence and slightly granulose, the scutellum much broader, and the legs 

 more obscured by black. The antenna is barely longer than head and 

 thorax together, and the third vein reaches to more than three fourths 

 of the wing-length. Tarsal characters as in flaripes. 



Length, 2 mm. 



Type locality, St. Joseph, 111., May 17, 19 14. Paratype from Du- 

 bois, 111., April 24, 19 14. Swept from vegetation along banks of 

 streams. 



Nothing is known of the early stages. 



